Tellurian



y 1 B. B. MAHATHO 1,860,933

TELLURIAN Filed July 27, 1929 ,0 II f 9 6 Inventor. 7 Boodhun Bazlchunflahaiho.

Patented May 31 1932 f BOODHUN BAICHUN MAHATHO, or ovnaroa'r, DURBANQUNIO on sourm ArRidA TELLURIAN 7 Application filed July 27, 1929, Serial No.381 ,615, and in the Union of South Africa, August 22, 1928. 1

This invention relates were provision of;

mechanical means whereby the movements of the. heavenly bodies may be demonstrated 1 and has for its object to provide means" for illustrating more particularly the movements of the moon in relation to the earth and of both relative to the sun. A further feature of the invention is the provision of means whereby at a glancemay be seen the days and months as they occur as well as the solstices and equinoxes.

Provision is also made for automatically illustrating the parts of the earth which are in light and in darkness during the 24 hours tower byibrackets orthe like.

In accordance with my invention .1 provide a pedestal or base on which I erect gearing consisting of a train of wheels operated by a handle, and I provide that certain pinions shall engage a rack to whichis secured a tower of suitable shape, the whole capable of revolving on the pedestal; Within the tower and engaging the aforementioned train of whee1s through the mediumi of beveled gears for the like, Ierectaj shaftterminating above the tower in a sphere representing the At a suitableheight on this shaft I mount furtherbeveled gears by means of which I transmit motion to ashaft disposed horizontally in respectof the tower. This horizontal shaft may conveniently be housed in a casingwhich forms apart of the sup porting frameto other parts of the instrument and whichframe may be secured to the I The horizontal shaft carries beveled gears at its outer end and thereby motion is imparted to the shaft which represents the axis of the earth. Inaddition to carrying the sphere represent- I ing the earth this shaft also supports a frame in which is pivoted a plate orplates encircling the earth sphere a'ndwhich, being hung above the centre of gravity, will. always maintain a vertical position or one perpendicular to rays from the sphere representing the sun. The aforementioned frame also carries beveled gears through which motion' is imparted to aworm and worm wheel to the shaft or spindle by which is attached an arm a carrying. the sphere representing the moon.

A gap is made in the housing to the horilower end is pivoted to a bracket jor the like on the wall ofthe tower, and to whose upper end is attached a rod orlike member having the other end secured to the top of the moon spindle or shaft or to any other convenient part oftheearth sphere frame. A tension spring is connected between the frame andthis member to maintain contact at all times between it and the cam oreccentric: .The to and fro movement-of the vertically disposed member caused by the cam excites similar movement in the earth spheres axial shaft thereby providing for the varying inclination'of the earth in its progress round the sun, theinclination'being facilitated by the. provision ofua universal joint inthe'axia'l shafting. g In order that myinvention may b read ily understood and carried into practice,'ref-' erence is:hereby;made to the accompanying sheet ofdrawingswherein Fig. lis an ele-- vational view of the invention, Fig.2 isa;

sectional elevation of thetower and internal and adjacent mechanism [with' the ball; or

sphere representing the earth removed, and Fig.8 is an elevational view of the ballor sphere with attendant sphere representing the moon, supporting frame and gearing I Referring to these drawings wherein like reference. numbers indicate the same parts wherever occurring throughout all the viewgs,--, 1 denotes the base or pedestal on whichis mounted the train of wheels 2' which is op erated by thehandle 3 and imparts motion at the required speed and-ratioto the tower l 4 through the rack 5 and pinion 6 and to the i central vertical shaft v 7 --which supports the globe- 8 representing the sun. The central vertical-shaft 7 further imparts motion by means of beveled gears 9 to the" horizontal shaft 10 which bymeans of the gears :11 im-.

parts motion to the sphere 12 whichrepresents the earth, through the axis 13 which at it ,and. therefore revolving with it an arm 21' at' the end'ofwhich is mounted'the small sphere 22 representing the moon. In order to effect the change in the inclination,;of the axis-.l3gthe. top of; the rshaftz20= is connected by means of a suitable collar 23 orother convenient means to a rod 24 which,

is-l 'seeured at its other end tothe-end of'a more or le ss vertical member 25 pivoted at 26 ,and engaging'the-lhollowrim of a cam OI' 'GGQIIlJIlC 27, contact being m'aintained'by theprovis-ion of a tension spring 28. secured at a convenient point in'the frame or supporting members 29. The camoreccentric 27 'is-attache'clto a worm-wheel 30 which is driven-bya worm 31=on theshaf-t 10; Mounted} on and revolving with the shaft 32, on

V whichthe worm wheel 30 is also secured,

isa dial- 33 on=w-hich are set out divisions-34 I for the twelve months of the yearand' further spaces'areprovided at- 35 for indicating by means of-the pointer 36 thejsolstices and equinoxes;

Toindicate the line of demarcation be tweenylight and darkness a plate or two half plates 37 are hung-in the' frame 15*and they 'encirclethesphere-1-2z By reason of their being pivoted at 38-above the-centre of gravitythisplateorplates 37- will always bein v aperpe'ndi'cular positionrelative to-the rays from the sphere 8 representing the sun irrespeetive' of the inclination' Otherwise of theaxis'13. w .7 t

.Inope-ration theysph r -gv repre sented mQSl effectively by an "illuminated globe and thesphere 12 by the known type of the-world; while'thesphere 22-may have the half facing-- the earth colored white and the other half} a; dark color, asshown in Fig. 1.

The correct setting of the spheres and dials having-been determined-the handle 3 is operated and results in the slow revolution of the tower Je'which carrieswith it the frame29 as well as the earth 12-and the moon 22. In addition to the revolution of these satellites round the sun8'theearth 12 is causedto rotate onits axis 13 by means of the gears 11 while-the gears-17 givemotion to the worm 1-8 causing; the revolution Ofthe worm. wheel1 19 which having a ratio of, 28wto;-one causes the moon 22t-o rev olve roundthe earth once in28-days v to A wor n 3'1, isprovided in the haftflo. This causesthe 'wormwheel 30 to revolve carrying withit the dial 33 and the cam or connecting rod 24 to the frame 15 and with it I the axis 13'of the earth 12, such movement being made possible by the provision of the universal joint 14.

It will be seen from the above that'I have bygmy invention providedia; simple andiefiece tivemeansof illustrating demonstrating the movements of certain of the heavenly bodies in relation to ione I another an d-,to,,-t he sun, my invention clearly illustrating (1) the causes of day and night, (2) the causes of long and short days, (3) the seasons, (4:) the solsticest andaequinoxes, 5;);then1 onthsiof the year, (6) the annual revolution, (7 the of'theyear, (8-)-the revolution'ofjthc moon,

(9) the phases of the moon, (10:) 'the pos'sibility, of eclipses, and" morning, evening, 7

sunsetor dawn at any particular place.-'

I claim 1. A tellurian adaptedto; demonstrate the} movements of the moon in; relation to the earth andof both'in relation-tothe-sun,comprising a central revolving-support, mechaniscal'means consisting of trainsiof wheels, beveled gears, shafting, and spheres to. repre sent the earth, moon and sun, attached toand, workingv from said support; cam mechanism to vary theinclination oif on e of the-spheres, and; a graduated dial rotatedbysaid shafting to indicate in correct succession certain divisions of'time corresponding to the ;.v-ari a-' bleFrelat-iveposition ofthe sun, earth and moon-toone another. 2. A tellurian' adapted-to demonstrate the m em t ffll H 1? e ti' nc 0 h e rt df fbO -h n a eni vs he lim- 9w prising. a central revolvingsupport, mechani l m ns ns t n q f in i 'fn ee ,her d; g at s and h ee sp eresu p;- e n he a 1 ,m0 nd', uit.) atta hes t W rkin m: Sai pp r am esh? anism to vary thejinclination offthe. axis of the 'spherefrepresenting the earth a'gradu ated revolving dial actuatedifrom saidsup; p s k th" rt i di sien's crane r sp n to he ariab e, rela ive pps ition of the. sun, earth, and" moon to one ane e n a ip n r t ndictment p j nt e f he ea eedar ye rniar sed. p Said al;i p op r: e t pendence with the rela ive:JPQSit QnS-" f" he th e spheres to oneanother.

' 3. A- tellurian a ape ib amass-teat me s f h moon n; relati r q h earth n fboth nv nt nsih tsnm ea p 's ei t e i ev l in supper-1 im's han 'r' 1 cal means co i t n ef rainset heels, et eled gears, shafting, and spheres to rep ,&-. e t h h, 901 and si lattaqhedi a and working'fr'om said support' camm' anism to we e' nelin ti's m fi h s; p s n he, e rth, aiueiv rsafvismt'td permit of such inclination, a graduated dial 

